담수호에 유입되는 하천수에서의 SS와 COD 및 T-P와의 상관관계

우선호 ( Woo Sun Ho ),윤춘경 ( Yoon Chun Gyoung ) 한국농공학회 1999 한국농공학회 학술대회초록집 Vol.1999 No.-

When it rains, soil erosion occurs and soil particles move into the reservoirs or stream. Nutrients and contaminants, which are adsorbed on soil particles, flow into waterbody and are leached into water. Then they effect on water quality and eutrophication of reservoirs. In this study, correlation of SS to COD was surveyed, and that of SS to T-P was also done. R² values in wet period were almost over 0.8, but were very low in dry period. This shows that concentrations of COD and T-P will be assumed by using SS concentrations in wet period in stream.

오수처리수의 관개가 벼의 생육 및 수확량에 미치는 효과

우선호 ( Woo Sun Ho ),윤춘경 ( Yoon Chun Gyoung ) 한국농공학회 2000 한국농공학회 학술대회초록집 Vol.2000 No.-

Effect of reclaimed sewage on the paddy rice culture was examined by field experiment for two consecutive years. The domestic sewage was treated by the constructed wetland, and the effluent of the treatment wetland was used for irrigation water. Growth components and yields were compared against the CONTROL plot where conventional fertilization was applied. In general, addition of the reclaimed sewage irrigation which contained high nutrient concentration didn’t affect paddy rice culture adversely, and even better growth and more yields were observed. Overall, reclaimed sewage irrigation was thought to be one of practical alternatives for irrigation water.

전북지역 급성 ST 분절 상승 심근경색증 환자의 119 이용 실태

우선호 ( Sun Ho Woo ),윤경호 ( Kyeong Ho Yun ),이미림 ( Mi Rim Lee ),김은경 ( Eun Kyoung Kim ),고점석 ( Jum Suk Ko ),이상재 ( Sang Jae Rhee ),이정미 ( Jeong Mi Lee ),김남호 ( Nam-ho Kim ),오석규 ( Seok Kyu Oh ) 대한내과학회 2016 대한내과학회지 Vol.90 No.6

목적: 급성 ST 분절 상승 심근경색증 환자에서 최초 의료접촉 방식 및 이에 따른 특성과 시간과의 관계를 조사했다. 방법: 전북 권역심혈관센터 데이터베이스에 등록된 527명의 일차적 관상동맥 중재시술을 받았던 급성 ST 분절 상승심근경색증 환자를 대상으로 의료 접촉 방식에 따른 일반적특징, 사회적 요인 및 시간 지연에 대한 예측 인자에 대해 조사했다. 결과: 전체 환자 중에서 28.8%만이 119를 이용했으며, 이들은 심부전, 심인성 쇼크 등의 임상 양상이 더 좋지 않았다. 최초 119를 이용하였어도 36.2%의 환자가 중재시술이 불가능한 병원으로 이송되었고 이들은 유의하게 증상 발생 후 관상동맥 중재술 시행까지 시간이 지연되었다(211.3 ± 358.0분vs. 320.2 ± 374.6분, p = 0.034). 증상 발생 후 관상동맥 중재술 시행까지 시간 단축의 독립적인 요인으로는 119를 이용(OR = 0.4, p < 0.001)하는 것과 이전 관상동맥 중재술 기왕력(OR = 0.4, p = 0.033)이었으며, 시간 지연의 독립적인 요인으로는 65세 이상의 고령(OR = 1.9, p = 0.003)과 중재술이 불가능한 병원을 먼저 내원한 경우(OR = 2.0, p < 0.001)였다. 결론: 전북 권역 심근경색증 환자들은 낮은 119 이용률을 보이며, 상당수가 중재시술이 불가능한 병원으로 이송되고 있다. 심근경색증에 대한 증상 인지율을 높이고 증상이 시작되면 즉시 119 구급차를 이용하여 중재시술이 가능한 병원으로 방문하도록 하는 홍보 및 교육이 필요할 것으로 생각된다. Background/Aims: The use of emergency medical services (EMSs) at the onset of pain, and the relationship between transport type and the treatment delay for acute ST-segment elevation myocardial infarction (STEMI) were evaluated using the Jeonbuk Regional Cardiovascular Center database. Methods: In total, 527 STEMI patients who underwent primary percutaneous coronary intervention (PCI) were enrolled in this study. Basic characteristics, socioeconomic variables, and delay factors were compared between patients that contacted an EMS as first medical contact (FMC) and patients that used other forms of FMC. Results: Only 28.8% of patients used EMS as their FMC. The patients that used EMS showed significantly shorter onset-to-balloon time than those who did not (250.7 ± 366.6 min vs. 405.9 ± 649.8 min, p = 0.001). However, 36.2% of patients that used EMS as FMC were transported to non-PCI-capable centers, which led to significantly prolonged onset-to-balloon time. Multivariate analysis revealed that transfer via another hospital (odds ratio [OR] 2.0, p < 0.001), EMS as FMC (OR 0.4, p < 0.001), age > 65 years (OR 1.9, p = 0.003), and previous history of PCI (OR 0.4, p = 0.033) were independent predictors of pre-hospital delay. Conclusions: EMS used as FMC at the onset of chest pain was an important factor for decreasing treatment delay in patients with STEMI. However, a small number of patients used EMS as FMC, and some patients that used EMS were transported to non-PCI-capable centers. Public campaigns and education are needed to raise the public awareness of STEMI and the use of EMSs. (Korean J Med 2016;90:507-513)

Diurnal variation of flow-mediated dilatation in healthy humans

김용철,윤경호,우선호,정영훈,임재홍,황교범,정진우,이미림,이정미,이상재,김남호,오석규,정진원 대한고혈압학회 2015 Clinical Hypertension Vol.21 No.5

Introduction: The measurement of flow-mediated dilatation (FMD) via ultrasound has been established as a reliable non-invasive measurement of endothelial function. However, the guidelines mention nothing regarding diurnal variation of FMD. Thus, we investigated the FMD in healthy people and diurnal variation of FMD. Methods: Twenty-five apparently healthy persons participated in this study. All participants had no history of cardiovascular diseases, hypertension, or diabetes and used any medication. For each volunteer, the measurements were repeated in the morning and afternoon on two different days. We checked capillary blood glucose, total cholesterol, triglyceride, high-density lipoprotein (HDL), and low-density lipoprotein (LDL)-cholesterol. Results: The average of FMD measurements was 8.45% ± 2.39%. The mean values of systolic and diastolic blood pressure, heart rate, lipid profiles, and glucose levels were similar between the morning and afternoon measurements after 9-h fasting. There was no significant difference of FMD measurements between the morning and afternoon (8.32% ± 2.27% and 8.58% ± 2.56%, p = 0.329). Moreover, there was significant correlation between FMD in the morning and afternoon (r = 0.856, p < 0.001). Conclusions: Our study shows measurement of FMD was 8.45% in healthy Koreans. Also, there was no significant difference of FMD measurements between the morning and afternoon.

Effect of High Dose Rosuvastatin Loading before Percutaneous Coronary Intervention on Contrast-Induced Nephropathy

윤경호,임재홍,황교범,우선호,정진우,김용철,조대열,고점석,이상재,이은미,오석규 대한심장학회 2014 Korean Circulation Journal Vol.44 No.5

Background and Objectives: Contrast-induced nephropathy (CIN) is associated with increased morbidity and mortality. This observational, non-randomized study evaluated the effect of rosuvastatin loading before percutaneous coronary intervention (PCI) on the incidence of CIN in patients with acute coronary syndrome (ACS). Subjects and Methods: A total of 824 patients who underwent PCI for ACS were studied (408 patients in the statin group=40 mg rosuvastatin loading before PCI; 416 patients of control group=no statin pretreatment). Serum creatinine concentrations were measured before and 24 and 48 hours after PCI. The primary endpoint was development of CIN defined as an increase in serum creatinine concentration of ≥0.5 mg/dL or ≥25% above baseline within 72 hours after PCI. Results: The incidence of CIN was significantly lower in the statin group than that in the control group (18.8% vs. 13.5%, p=0.040). The maximum percent changes in serum creatinine and estimated glomerular filtration rate in the statin group within 48 hours were significantly lower than those in the control group (5.84±22.59% vs. 2.43±24.49%, p=0.038; -11.44±14.00 vs. -9.51±13.89, p=0.048, respectively). The effect of rosuvastatin on preventing CIN was greater in the subgroups of patients with diabetes, high-dose contrast medium, multivessel stents, high baseline C-reactive protein, and myocardial infarction. A multivariate analysis revealed that rosuvastatin loading was independently associated with a decreased risk for CIN (odds ratio, 0.64; 95% confidence interval, 0.43–0.95, p=0.026). Conclusion: High-dose rosuvastatin loading before PCI was associated with a significantly lower incidence of CIN in patients with ACS.

급성 기도 폐쇄를 동반한 식도 거대 지방종의 내시경 절제

조동호 ( Dong Ho Jo ),전형구 ( Hyung Ku Chon ),우선호 ( Sun Ho Woo ),김태현 ( Tae Hyeon Kim ) 대한소화기학회 2016 대한소화기학회지 Vol.68 No.4

Most esophageal lipomas are discovered incidentally and are small and asymptomatic. However, large (>4 cm) lipomas may cause various symptoms, including dysphagia, regurgitation, or epigastric discomfort. We present a 45-year-old woman with intermittent sudden choking and globus pharyngeus. Upper gastrointestinal endoscopy and endoscopic ultrasound revealed an approximately 10.0×1.5 cm pedunculated subepithelial tumor in the upper esophagus, identified as the cause of her symptoms. A thoracic computed tomography scan revealed a fat attenuated longitudinal mass along the upper esophagus, suggestive of a lipoma. Endoscopic resection of the lesion was performed with a detachable snare to relieve her symptoms, and the pathologic findings were consistent with a lipoma. (Korean J Gastroenterol 2016;68:210-213)

연구논문 / 오수처리용 인공습지내 토양의 이화학적 특성조사

윤춘경(Chun Gyeong Yoon),권태영(Tae Young Kwun),우선호(Sun Ho Woo) 한국농촌계획학회 1999 농촌계획 Vol.5 No.2

인공습지 오수처리수를 이용한 벼재배 실험

윤춘경 ( Yoon Chun Gyeong ),함종화 ( Ham Jeong Hwa ),우선호 ( Woo Sunfa ),김민희 ( Kim Min Hee ) 한국농공학회 2001 韓國農工學會誌 : 전원과 자원 Vol.43 No.2

A pilot study was performed at the experimental field of Konkuk University in Seoul, to examine the feasibility of the constructed wetland system for sewage and the effect of treated sewage irrigation on the paddy rice culture and its soil characteristics. The constructed wetland performed well, in that effluent concentrations of pollutants were significantly lower than concentrations of the influent. Median removal efficiencies of BOD₅ was about 78% and slightly lower during winter. Removal efficiencies form TN and TP were approximately 48 and 21%, respectively, and relatively less effective than that of BOD₅. Irrigation of treated sewage to paddy rice culture did not affect adversely in both growth and yield of rice. Instead, plots of treated sewage irrigation showed up to 50% more yield in average than the control plot. It implies that treated sewage irrigation might be beneficial to rice culture rather than detrimental as long as it is treated adequately and used properly. Soil was sampled and analyzed before transplanting and after harvesting. pH was slightly increased due to irrigation water, but it may not be concerned as long as the treated sewage is within the normal range. EC was increased in first year but decreased in second year, therefore salts accumulation in the soil could be less concerned. OM and CES was slightly increased, which might be beneficial on growing plants. TN did not show apparent pattern. Available phosphorus was decreased after rice culture, but the quantity of phosphorus(TP-available phosphorus) was rather increased which implies that excessive phosphorus supply may result in phosphorus accumulation in the soil. Overall, the constructed wetland was thought to be an effective sewage treatment alternative, and treated sewage could be reused as a supplemental source of irrigation water for paddy rice culture without causing adverse effect as long as it is treated adequately and used properly. For full-scale application, further investigation should be followed on environmental risk assessment, tolerable water quality, and fraction of supplemental irrigation.ion.

오수처리수 관개방법에 따른 수도 생육과 토양내 영양물질 변화

윤춘경 ( Yoon Chun Gyeong ),황하선 ( Hwang Ha Sun ),우선호 ( Woo Sun Ho ) 한국농공학회 2001 韓國農工學會誌 : 전원과 자원 Vol.43 No.6

This study was performed to examine the rice growth and nutrient change in paddy soil with reclaimed sewage irrigation. Total nitrogen and total phosphorus in the experimental system were analyzed before and after rice culture. The experiment lasted three consecutive years, and this paper presents results of the last year. Additional supply of nutrients to the rice culture by reclaimed sewage irrigation was significant and it increased the yield. Nutrient uptake by rice plant increased with more nutrient supplied, however. there was limit in plant uptake. Nutrient accumulation occurred in the soil and it was more apparent for the phosphorus where most of the remaining quantity was accumulated while substantial amount of nitrogen was lost during the growing season. This study suggested that additional nutrient supply by reclaimed sewage irrigation might be a supplemental benefit to the rice culture, and it can help the fertilization management. However, long term effects of continual reclaimed sewage irrigation should be assessed carefully including nutrient mass balance in the paddy rice culture system.

농촌지역 수질개선을 위한 인공습지실험시설의 3 년간 실험결과 검토

윤춘경(C . G . Yoon),권순국(S . K . Kwun),우선호(S . H . Woo),권태영(T . Y . Kwon) 한국물환경학회 1999 한국물환경학회지 Vol.15 No.4

Sewage treatment study was performed for three years by constructed wetland experimental system at Konkuk University. The system was a subsurface flow type, and consisted of 60㎝ depth of sand and reeds. It worked continuously including winter time, and the sewage flowed without freezing even when average daily air temperature was below -10℃. Average removal rates of BOD, COD, and SS were in the range of 60∼71%, T-P removal rate was about 50%, and T-N removal rate was 24.3%. The reason for poor T-N removal might be due to high influent concentration and shorter retention times. The effluent of the wetland system often exceeded effluent water quality standards for sewage treatment plant, therefore, further treatment could be required if the effluent needs be discharged to the public water. Wetland system involves relatively large land area and could be suitable for rural area rather than urban area. Therefore, utilization of sewage for agricultural purpose or subsequent land treatment is recommended as a ultimate disposal depending on site specific environmental conditions.